Finding the Fourth Proportional to 111.11, 153.33 and 61.98

Step by Step Solution

1. Step 1: Write the proportion equation
   111.11 : 153.33 = 61.98 : x
2. Step 2: Convert to fraction form
   111.11/153.33 = 61.98/x
3. Step 3: Cross multiply
   111.11x = 153.33 × 61.98
4. Step 4: Simplify right side
   111.11x = 9,503.45
5. Step 5: Solve for x
   x = 9,503.45/111.11
6. Step 6: Final answer
   x = 85.54